Name: _________________________________________ Seat: _____ Date: _________________ Period: ______
Name: _________________________________________ Seat: _____
Chemistry Lab Worksheet
Determining Quantitative Data on Material Samples
Introduction
Today you and your lab partner will be determining gram, mole, and particle quantities of selected
material samples.
Materials:
aluminum foil, table sugar, table salt, water, baking soda, vinegar, beakers, balance, graduated
cylinders, lab notebook, and pencils
Procedure:
1. Come up to Mr. C’s desk and get a sample of a substance and a Quantitative Evaluation
Sheet.
2. Determine the identity of your sample. It will be one of the substances listed on the front
board.
3. Determine the mass of the sample, and then convert the mass to moles and particles.
4. Fill in the information in the Data Table below.
5. Return the sheet and your sample to Mr. C.
6. Repeat steps 1-5 with another Quantitative Evaluation Sheet, up to three total.
Data Table
Quantitative
Evaluation
Sheet #
Identity of
Substance
Mass of Sample
(g)
Convert to
Moles of
Sample (mol)
Convert to Number of
Particles in Sample
(atoms or molecules)
Problem:
Chemical analysis of citric acid shows that it contains 37.51% C, 4.20% H, and 58.29% O. What
is its empirical formula?